The steel earth wire shall be manufactured in accordance with BS 183. The finished strand and the individual wires shall be of uniform quality and have the properties and characteristics as specified in this specification.
The galvanized steel wires used in the construction of the steel earth wire shall comply with the requirement of BS 443.
The outer wires of all strands shall have a right-hand lay (Z). All wires shall be stranded with uniform tension. Stranding shall be sufficiently close to ensure no appreciable reduction in diameter when stressed to 10% of the specified wire strength.